Dear Glenn The positive attribute hasn't been extended to data variables in CF because the standard name always implies the sign convention e.g. toa_net_downward_longwave_flux toa_net_upward_shortwave_flux The advantage of doing it is this way is that it is impossible for the sign convention to be missing if the quantity is identified by standard name! I am not clear about the details of your case, but I guess that it should be possible to use a standard name which states what the sign convention is for the thickness of the water column.
Best wishes Jonathan _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
